as

collector/tests/test_protocol.py

@@ -6,8 +6,10 @@ import unittest
 sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 
 from protocol import (  # noqa: E402
+    pack_interval_min,
     pack_report,
     pack_slot_config,
+    unpack_interval_min,
     unpack_report,
     unpack_slot_config,
 )
@@ -41,6 +43,22 @@ class ProtocolTests(unittest.TestCase):
         self.assertEqual(c.flags, 0x03)
         self.assertEqual(c.period_s, 30)
 
+    def test_interval_min_roundtrip(self):
+        raw = pack_interval_min(30)
+        self.assertEqual(len(raw), 2)
+        self.assertEqual(raw, bytes((30, 0)))
+        self.assertEqual(unpack_interval_min(raw), 30)
+        raw2 = pack_interval_min(0x1234)
+        self.assertEqual(raw2[0], 0x34)
+        self.assertEqual(raw2[1], 0x12)
+        self.assertEqual(unpack_interval_min(raw2), 0x1234)
+
+    def test_interval_min_bad_length(self):
+        self.assertIsNone(unpack_interval_min(b""))
+        self.assertIsNone(unpack_interval_min(b"\x00"))
+        self.assertIsNone(unpack_interval_min(b"\x00\x00\x00"))
+
 
 if __name__ == "__main__":
     unittest.main()
+